Malicious PDF — malware analysis report

Static analysis result for SHA-256 f366dbe44b187bc4…

MALICIOUS

PDF

72.4 KB Created: 2021-04-19 23:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0632aef8f72d435e39f86eb3fd919a35 SHA-1: 70a73969f855cff869dd3e48f49bc6cf4398d614 SHA-256: f366dbe44b187bc46171d6adecc7300a88e98103a912de89ab108b2353dfa152
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gimoguvi.ru/strik?utm_term=square+root+and+cube+root+worksheet+grade+8 PDF link annotation
    • http://modezewop.mygamesonline.org/78054770709.pdfIn PDF document text
    • http://takovod.66ghz.com/vscode_prettier_format_on_save_not_working.pdfIn PDF document text
    • http://janusadow.mygamesonline.org/que_es_psicologia_social.pdfIn PDF document text
    • http://rupasuwejex.22web.org/pdf_js_blob_file.pdfIn PDF document text
    • http://sagebiwepul.22web.org/45943868978.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/42781566816.pdfIn PDF document text
    • http://filozajerezabi.getenjoyment.net/a_dozen_a_day_mini_book_download.pdfIn PDF document text
    • http://katomowubi.iblogger.org/ccna_v3_lab_guide_200_125.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1aaf7f0-3dcb-4a1f-a7c3-73228a95c9d4/do_i_drink_too_much_alcohol_quiz.pdfIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_b53f4fcf20d14134b8faf6cb553f4291.pdf?index=trueIn PDF document text
    • http://vivaxufoti.rf.gd/scientific_method_examples_for_elementary_students.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_928fd35da2944ecdadd4654359ef96c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbb9fa16-0eb0-4281-bd60-6f537abda09a/verb_list_english_to_hindi_download.pdfIn PDF document text
    • http://vakakumiwizexoj.epizy.com/78670840007.pdfIn PDF document text
    • https://69669160-cc20-42a3-bfef-e1e1fd1f8163.filesusr.com/ugd/8094a4_2bf3fc44e68f42ce9301a2b795f83d7d.pdf?index=trueIn PDF document text
    • http://dufojamimusim.atwebpages.com/33647967932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ab5cae-0200-4213-ac87-2b9882d082a7/how_heavy_is_a_55_inch_samsung_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de561a9-a365-4267-baee-b9631a307c54/pipirekumudetofakunuwokok.pdfIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_af3f29b64f87473da1006d9c3d0715a5.pdf?index=trueIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_efdaeffa1c714a0f8e94ec896cf60454.pdf?index=trueIn PDF document text
    • http://kijenor.epizy.com/adenocarcinoma_metastasico_pulmonar.pdfIn PDF document text
    • http://xerikosepekev.epizy.com/80082504684.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1B 5888 bytes
SHA-256: 2c98693de7e0b42a9888701a8bb6f0d350efb838d93e700dbc14b46aea3b90b3
font_01_sfnt_off0000f128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF128 10244 bytes
SHA-256: 0f2e524262a8fcb8aebb19fd42c4a476b86ba67ccf04ec828c128dced366c941

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